CRISPR/Cas9-induced shank3b mutant zebrafish display autism-like behaviors.
Chun-Xue Liu, Chun-Yang Li, Chun-Chun Hu and 5 others
PMID 29619162WHAT IT FOUND
Zebrafish with a shank3b mutation moved less, swam in repetitive patterns, and showed weaker social grouping.
They also had lower levels of brain proteins. This is an animal model result, not evidence about human autism treatment.
Key findings
01Larval and adult shank3b mutant zebrafish moved less than wild-type zebrafish.
02Adult shank3b mutant zebrafish showed repetitive swimming and looser social grouping than wild-type zebrafish.
03Adult shank3b mutant zebrafish brains had lower homer1 and synaptophysin protein levels than wild-type brains.
STILL TO COME
How it was doneWhat they found
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What it does not show
The study was done in zebrafish, not in people, so it does not directly show how SHANK3 changes affect human behavior or therapy. The authors state that it remains challenging to determine whether these abnormal behaviors translate to human SHANK3-related ASD. Some early differences were not statistically significant, and larval morphological differences became less noticeable as development continued. Several measurements used small groups, including N = 3 for protein levels. The paper does not report human participants, clinical outcomes, or treatment effects.
Declared interests
The supplied article text does not include a conflicts-of-interest or funding declaration. The metadata lists NIH extramural and non-U.S. government research support.
The easy way to misread this
Do not read this as evidence that SHANK3 mutations cause autism-like behaviors in people or that any therapy is supported. The study only tested zebrafish, and the authors state translation to human SHANK3-related ASD remains uncertain.